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What is causing ERROR: there is no unique constraint matching given keys for referenced table?
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In postgresql all foreign keys must reference a unique key in the parent table, so in your bar table you must have a unique (name) index.
See also http://www.postgresql.org/docs/9.1/static/ddl-constraints.html#DDL-CONSTRAINTS-FK and speci...
nginx: [emerg] could not build the server_names_hash, you should increase server_names_hash_bucket_s
...ck. Same error. what could be causing this? I also tried rebooting, I am really at a loss here. Any help would be greatly appreciated.
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Is there a way to word-wrap long words in a div?
... I'm using Firefox 24.6.0, and the word-wrap: break-word is what actually worked.
– user545424
Jun 26 '14 at 20:41
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How to show popup message like in Stack Overflow
...he example.
Here's how Stackoverflow does it:
This is the markup, initially hidden so we can fade it in:
<div id='message' style="display: none;">
<span>Hey, This is my Message.</span>
<a href="#" class="close-notify">X</a>
</div>
Here are the style...
How to deserialize a list using GSON or another JSON library in Java?
...nymous subclass of TypeToken<List<Video>>... it's a trick that allows the resulting type to represent List<Video>, since subclasses of fully specified generic types retain the generic type information.
– ColinD
Dec 10 '10 at 7:30
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Simple calculations for working with lat/lon and km distance?
...long coordinates are expressed in degrees, while the cos function in most (all?) languages typically accepts radians, therefore a degree to radians conversion is needed.
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Preserve line endings
... run sed to do some substitution on windows and I noticed that it automatically converts line endings to Unix (\n). Is there an option to tell sed to use Windows line endings (\r\n) or even better to preserve the line endings from the file?
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WITH (NOLOCK) vs SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
...If you use the set transaction isolation level statement, it will apply to all the tables in the connection, so if you only want a nolock on one or two tables use that; otherwise use the other.
Both will give you dirty reads. If you are okay with that, then use them. If you can't have dirty reads,...
Best way to combine two or more byte arrays in C#
...able<byte> using LINQ's Concat<> - 0.0781265 seconds
Finally, I increased the size of each array to 1 million elements and re-ran the test, executing each loop only 4000 times:
New Byte Array using System.Array.Copy - 13.4533833 seconds
New Byte Array using System.Buffer....
How to fire AJAX request Periodically?
...the page after every 5 seconds. But I want to do it using jQuery and AJAX call. Is it possible?
4 Answers
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